Pith Number

pith:AKA2JRRC

pith:2005:AKA2JRRCQGJBWJRVXSZY5RY7YU

not attested not anchored not stored refs pending

The Reddening of Red Supergiants: When Smoke Gets In Your Eyes

Bertrand Plez, Emily M. Levesque, Eric Josselin, Geoffrey Clayton, K. A. G. Olsen, Philip Massey

arxiv:astro-ph/0508254 v1 · 2005-08-11 · astro-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{AKA2JRRCQGJBWJRVXSZY5RY7YU}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-07-04T17:15:00.078663Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0281a4c62281921b2635bcb38ec71fc53349d1899d76128d4c11fec753a094c5

Aliases

arxiv: astro-ph/0508254 · arxiv_version: astro-ph/0508254v1 · doi: 10.48550/arxiv.astro-ph/0508254 · pith_short_12: AKA2JRRCQGJB · pith_short_16: AKA2JRRCQGJBWJRV · pith_short_8: AKA2JRRC

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/AKA2JRRCQGJBWJRVXSZY5RY7YU \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 0281a4c62281921b2635bcb38ec71fc53349d1899d76128d4c11fec753a094c5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bb3b27c58d62b670a7d7f482bf9a46bcfae39c84c8c58c3eb92588142c821ba9",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2005-08-11T04:02:08Z",
    "title_canon_sha256": "105dc5fc303be54f62156c11f0e2c82ec2b1c0c94bc99be82fb3a3a0de1ce9bd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0508254",
    "kind": "arxiv",
    "version": 1
  }
}